@SlimShimey, Hi! Thanks for viewing my diary! I noticed the deficiency when my leaves started to show little orange spots that turned brown, which usually means a calcium deficiency. When growing in soil the soil naturally has nutrients for the plants so it’s not completely necessary to add any nutrients to soil. However with hydro there are no nutrients in the water so it is a must to add your own. Calcium deficiencies are super common in hydro.. so I added a little cal-mag and the brown spots are slowing down. If your plants had a cal-mag deficiency you would definitely know it, the leaves make it very obvious. :)
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